Dandy-roll.



No. 694,7l7. Patented Mar. 4, I902.

F. H. BILLS.

DANDY ROLL.

(Application filed Dec. 23, 1901.) (No Model.) I

nu: Nonm's FETERS ca. Pno'rouma, WASHINGTON. n. q

UNITED STATES PATENT OFFICE.

FRANK H. BILLS, OF SPRINGFIELD, MASSACHUSETTS.

DANLDYLROLL.

SPECIFICATION forming part of Letters Patent N 0. 694,717, dated March 4, 1902r Application filerl Decem'ber 23,1901. S rial No. 86,877. (No model.)

" ments in Dandy-Rolls, of which the following is a full, clear, and exact description.

This invention relates to improvements in dandy-rolls employed in paper-machines,and more particularly pertains to the construction of the supporting-shell, havingthe conformation of a cylinder, for supporting the usual longitudinal wires, winding-wire, and outer gauze or cloth covering.

The objects of the invention are to devise a construction of an open-work cylindrical frame which, first, is simple and practicable:

of construction-that is, susceptible of being produced comparatively quickly, easily, and cheaply-which is, secondly, lighter and composed of less wire than ordinarily employed in the dandy-roll frame, due account being taken of requisite strength, stiffness, and stability, and which, third-1y, by reason of the fact that the arrangement of the approximately diamond -shaped spaces comprised within the several crossing wires,which brings the apexes of the successive diamonds in the longitudinal aspect of the roll in helical or spiral lines instead of in lines parallel with the axis, the tendency of the roll to throw water radially and materially in the line of travel of the paper is avoided, for-as a matter of fact in this roll its tendencyis' to cause the unavoidable moisture which accumulates within the roll to have a progression substantially in the direction of the length of the roll, and thus the spraying or spattering of the nearly-finished paper which haspassed beyond the dandy-roll, and which spattering causes dark or mottled spots in the paper, is avoided. And by being able to make the supporting structure, which while fulfilling all the requisites thereof, much more open and with wider interstices than is ordinarily found in dandy-roll frames, the frothing effect in the use of the roll is measurably lessened, and, moreover, the washing out or cleaning of the roll, generally performed by forcing water thereinto through a hose, is somewhat more easily performed,

especially by reason of the spiral trend, hereinabove alluded to, of the intersections of the wires composing the supporting-frame, whereby the dislodgment of the fibers of the paper-stock underthe action of the forced water becomes facilitated.

r The invention is characterized by a cylindrical open-Work frame comprising a series of suitably heavy wires, which are suitably spaced and run substantially spirally in parallelism with each other from end to end of the roll, said series of wires of uniform spirality of course having no contact or direct connection one with another, and one or more other wires running spirally in the same direction as the aforementioned series of separated and parallel spiral wires, but having a difierent pitch or degree of spirality, whereby it crosses and has engagement or connection with each and every one of the aforementioned series of spirally-progressing wires, and the connection or engagementof the one wire with the series of wires of different pitch under this invention is by interweaving, the one wire or truss-wire, as it may be termed, alternately crossing over one and under the next one of the said series, and each wire which, as the case may be, is innermost at the place of'intersection has an approximately semicircular bend or crimp therein, all whereby almost entirely all the lengths of all of the spiral wires have their outer surfaces brought out to and conformable to the surface of a cylinder.

The improved roll is shown in the accompanying drawing, which is a plan view of a sufficient portion of the length of a dandy-roll, and which shows especially the novel combination and arrangement of a series of parallel spirally-coursed wires and the truss-wire vrunning spirally in the same direction, but

cession of spiral coils, the pitch or trend of the spiral being in the same direction as that of the four parallel running coiled wires aforesaid; but the pitch or trend of this wire 5 is not nearly as sharp or rapid as that of the other wires, so that the truss-wire 5 in its longitudinal course will cross each and-every one of the wires 1, 2, 3, 4t, and 5. His practicable to have the wire 5 coiled, for instance, six times as frequently in the length of the roll as are the other and more elongated coils of the other wires. This may be perceived in the drawing by following the course of the wire 1 from its end at the left to the point 1, endwise therebeyond, whereat this wire completes one convolution, and noticing that the wire 5 in the distance at the left from 1 to 1" makes about six convolutions. The wire 5 beingin contact with and being secured to each and every one of the other wires of longer spiralityat the points of intersections amply braces and stifiTens the structure. The trusswire 5 crosses over one, then under, and next over the wires of longer spirality in its intersection, respectively, therewith, attaining the advantage of a weaving connection or engagement, and at the intersections whichever of the wires is relatively innermost, whether it be the more closely coiled wire 5 or the other wires 1 to at, are formed with crimps or approximately semicircular bends, as indicated at o in the drawing, for the accommodation of the relatively outer wires and to permitallportions of the length of every wire except its crimped portions to uniformly lie at the periphery of a cylinder of the propersize. The wires at their places of intersection and contact are secured by solder, which is regarded as the most practical means for final connection.

On the cylindrical open-work structure constituted as described are supported the longitudinal wires 61, the winding-wire f, and the outer gauze covering g, and the roll is equipped with end heads 7t and gudgeons, all as usual in dandy-rolls.

I may employ more than one of the trusswires 5, having the spirality different from that of the several wiresl 2 3, the; but the employment of one wire, as shown, is sufficient for all practical purposes.

I am aware that dandy-rolls have been made in which wires running spirally in opposite directions are employed and in which the one set of wires while having crimped relations at the intersections with the other set is entirely within the other set, there being no interweaving, and such already-known roll when properly constructed for adequate strength and stability more wires are employed than I need to employ, resulting in more intersections at the points of the diamond spaces, which points range regularly and longitudinallyin comparatively frequent lines on the face of the roll; but I believe it to be new and highly advantageous to construct a roll with a wire thereof running spirally in the same direction as the spirality of a plurality of other wires, but with difierent frequency of coiling to a given length for the attainment of the objects set out in the initial portion of this specification, and by noting the particular points of the intersections of the wire 5 with the four other wires at the top or front of the roll denoted by the numbers 10, 11,12, and 13 it will be seen that the intersections or apexes of the spaces within the crossing wires have aspiral trend for inducing a longitudinal rather than a radial forcing of the moisture accumulating during use in the dandy-roll.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A supporting structure for a dandy-roll consisting of a series of separated Wires running spirally in the same direction from end to end of the roll, and another wire running spirally also in the same direction but with a different pitch or degree of spirality, and intersecting, in contact with, and secured to, each of the first-named series of wires, substantially as and for the purposes set forth.

2. A supporting structure for a dandy-roll consisting ofa series of wires 1, 2, &c., running in separated parallel spiral coils in the same direction, and another wire 5 having coils running in'the same direction as the first-named wires, but of different frequency or degree of spirality, and intersecting and in contact with the coiled wires of the first series, said wire 5 alternately crossing over and under the other wires, and every Wire which is innermost at its place of intersection being formed with the bend or crimp whereby the major portion of the length of all of the wires are conformable to the surface of acylinder, substantiallyas described.

Signed by me at Springfield,Massachusctts, this 20th day of December, 1901.

FRANK ll. BILLS. Vitnesses:

WM. S. BnLLows, 11. L. SMITH.

ICC 

